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/* ruby support for custom scheme handlers */
/* Author: Martin Povolny (xpovolny@fi.muni.cz) */
#include "libxml.h"
#include "ruby_xml_input_cbg.h"
static ic_scheme *first_scheme = 0;
int ic_match (char const *filename) {
ic_scheme *scheme;
//fprintf( stderr, "ic_match: %s\n", filename );
scheme = first_scheme;
while (0 != scheme) {
if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST scheme->scheme_name, scheme->name_len)) {
return 1;
}
scheme = scheme->next_scheme;
}
return 0;
}
void* ic_open (char const *filename) {
ic_doc_context *ic_doc;
ic_scheme *scheme;
VALUE res;
scheme = first_scheme;
while (0 != scheme) {
if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST scheme->scheme_name, scheme->name_len)) {
ic_doc = (ic_doc_context*)malloc( sizeof(ic_doc_context) );
// MUFF res = rb_funcall(
// rb_funcall( rb_mKernel,
// rb_intern("const_get"), 1,
// rb_str_new2(scheme->class) ),
// rb_intern("document_query"), 1, rb_str_new2(filename) );
res = rb_funcall( scheme->class,
rb_intern("document_query"),
1,
rb_str_new2(filename) );
ic_doc->buffer = strdup( StringValuePtr(res) );
ic_doc->bpos = ic_doc->buffer;
ic_doc->remaining = strlen(ic_doc->buffer);
return ic_doc;
}
scheme = scheme->next_scheme;
}
return 0;
}
int ic_read (void *context, char *buffer, int len) {
ic_doc_context *ic_doc;
int ret_len;
ic_doc = (ic_doc_context*)context;
if (len >= ic_doc->remaining) {
ret_len = ic_doc->remaining;
} else {
ret_len = len;
}
ic_doc->remaining -= ret_len;
strncpy( buffer, ic_doc->bpos, ret_len );
ic_doc->bpos += ret_len;
return ret_len;
}
int ic_close (void *context) {
free( ((ic_doc_context*)context)->buffer );
free( context );
return 1;
}
VALUE input_callbacks_register_input_callbacks() {
xmlRegisterInputCallbacks( ic_match, ic_open, ic_read, ic_close );
return(Qtrue);
}
VALUE
input_callbacks_add_scheme (VALUE self, VALUE scheme_name, VALUE class) {
ic_scheme *scheme;
Check_Type(scheme_name, T_STRING);
//MUFF Check_Type(class, T_STRING);
scheme = (ic_scheme*)malloc(sizeof(ic_scheme));
scheme->next_scheme = 0;
scheme->scheme_name = strdup(StringValuePtr(scheme_name)); /* TODO alloc, dealloc */
scheme->name_len = strlen(scheme->scheme_name);
//MUFF scheme->class = strdup(StringValuePtr(class)); /* TODO alloc, dealloc */
scheme->class = class; /* TODO alloc, dealloc */
//fprintf( stderr, "registered: %s, %d, %s\n", scheme->scheme_name, scheme->name_len, scheme->class );
if (0 == first_scheme)
first_scheme = scheme;
else {
ic_scheme *pos;
pos = first_scheme;
while (0 != pos->next_scheme)
pos = pos->next_scheme;
pos->next_scheme = scheme;
}
return(Qtrue);
}
VALUE
input_callbacks_remove_scheme (VALUE self, VALUE scheme_name) {
char *name;
ic_scheme *save_scheme, *scheme;
Check_Type(scheme_name, T_STRING);
name = StringValuePtr(scheme_name);
if (0 == first_scheme)
return Qfalse;
/* check the first one */
if (!strncmp(name, first_scheme->scheme_name, first_scheme->name_len)) {
save_scheme = first_scheme->next_scheme;
free(first_scheme->scheme_name);
//MUFF free(first_scheme->class);
free(first_scheme);
first_scheme = save_scheme;
return Qtrue;
}
scheme = first_scheme;
while (0 != scheme->next_scheme) {
if ( !strncmp( name, scheme->next_scheme->scheme_name, scheme->next_scheme->name_len ) ) {
save_scheme = scheme->next_scheme->next_scheme;
free(scheme->next_scheme->scheme_name);
//MUFF free(scheme->next_scheme->class);
free(scheme->next_scheme);
scheme->next_scheme = save_scheme;
return Qtrue;
}
scheme = scheme->next_scheme;
}
return Qfalse;
}
// Rdoc needs to know
#ifdef RDOC_NEVER_DEFINED
mXML = rb_define_module("XML");
#endif
void
ruby_init_input_callbacks(void) {
VALUE cInputCallbacks;
cInputCallbacks = rb_define_class_under(mXML, "InputCallbacks", rb_cObject);
/* Class Methods */
rb_define_singleton_method(cInputCallbacks, "register", input_callbacks_register_input_callbacks, 0);
rb_define_singleton_method(cInputCallbacks, "add_scheme", input_callbacks_add_scheme, 2);
rb_define_singleton_method(cInputCallbacks, "remove_scheme", input_callbacks_remove_scheme, 1);
}
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